diff --git a/app/Http/Controllers/Admin/CourseController.php b/app/Http/Controllers/Admin/CourseController.php
index 824cd17..178de2d 100755
--- a/app/Http/Controllers/Admin/CourseController.php
+++ b/app/Http/Controllers/Admin/CourseController.php
@@ -9,6 +9,8 @@ use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Gate;
 use Illuminate\Support\Facades\Storage;
 use Illuminate\Support\Str;
+use Intervention\Image\ImageManager;
+use Intervention\Image\Drivers\Gd\Driver;
 
 class CourseController extends Controller
 {
@@ -17,6 +19,30 @@ class CourseController extends Controller
         $this->middleware('auth');
     }
 
+    private function generateThumbnail($imagePath, $width = 400, $height = 300)
+    {
+        $manager = new ImageManager(new Driver());
+        $image = $manager->read($imagePath);
+        
+        // Пропорциональное уменьшение с crop по центру
+        $image->cover($width, $height, 'center');
+        
+        // Сохраняем как _thumb версию
+        $thumbPath = str_replace('.', '_thumb.', $imagePath);
+        $image->save(storage_path('app/public/' . $thumbPath));
+        
+        return str_replace('.', '_thumb.', $imagePath);
+    }
+
+    private function deleteThumbnails($path)
+    {
+        if (!$path) return;
+        
+        $thumbPath = str_replace('.', '_thumb.', $path);
+        Storage::disk('public')->delete($thumbPath);
+        Storage::disk('public')->delete($path);
+    }
+
     public function index(Request $request)
     {
         Gate::authorize('viewAny', Course::class);
@@ -81,7 +107,8 @@ class CourseController extends Controller
         $validated['has_certificate'] = $request->boolean('has_certificate');
         
         if ($request->hasFile('thumbnail')) {
-            $validated['thumbnail'] = $request->file('thumbnail')->store('courses/thumbnails', 'public');
+            $path = $request->file('thumbnail')->store('courses/thumbnails', 'public');
+            $validated['thumbnail'] = $this->generateThumbnail($path, 400, 300);
         }
         
         $course = Course::create($validated);
@@ -134,8 +161,9 @@ class CourseController extends Controller
         $validated['has_certificate'] = $request->boolean('has_certificate');
         
         if ($request->hasFile('thumbnail')) {
-            if ($course->thumbnail) Storage::disk('public')->delete($course->thumbnail);
-            $validated['thumbnail'] = $request->file('thumbnail')->store('courses/thumbnails', 'public');
+            if ($course->thumbnail) $this->deleteThumbnails($course->thumbnail);
+            $path = $request->file('thumbnail')->store('courses/thumbnails', 'public');
+            $validated['thumbnail'] = $this->generateThumbnail($path, 400, 300);
         }
         
         $course->update($validated);
@@ -147,7 +175,7 @@ class CourseController extends Controller
     {
         Gate::authorize('delete', $course);
         
-        if ($course->thumbnail) Storage::disk('public')->delete($course->thumbnail);
+        $this->deleteThumbnails($course->thumbnail);
         
         $course->delete();
         
diff --git a/composer.json b/composer.json
index 46b9787..422c9e5 100644
--- a/composer.json
+++ b/composer.json
@@ -7,6 +7,7 @@
     "require": {
         "php": "^8.3",
         "guzzlehttp/guzzle": "^7.9",
+        "intervention/image": "^3.11",
         "laravel/framework": "dev-master as 13.0",
         "laravel/sanctum": "^4.0",
         "laravel/tinker": "^2.10",
diff --git a/composer.lock b/composer.lock
index e8b0c79..25be1d4 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "54cdb3ddf3312af9d237737159ea9d71",
+    "content-hash": "5e9268b759e635964ff26f5e09bc95bc",
     "packages": [
         {
             "name": "brick/math",
@@ -1002,6 +1002,142 @@
             ],
             "time": "2025-02-03T10:55:03+00:00"
         },
+        {
+            "name": "intervention/gif",
+            "version": "4.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Intervention/gif.git",
+                "reference": "6addac2c68b4bc0e37d0d3ccedda57eb84729c49"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Intervention/gif/zipball/6addac2c68b4bc0e37d0d3ccedda57eb84729c49",
+                "reference": "6addac2c68b4bc0e37d0d3ccedda57eb84729c49",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^8.1"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "^2.1",
+                "phpunit/phpunit": "^10.0 || ^11.0",
+                "slevomat/coding-standard": "~8.0",
+                "squizlabs/php_codesniffer": "^3.8"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Intervention\\Gif\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Oliver Vogel",
+                    "email": "oliver@intervention.io",
+                    "homepage": "https://intervention.io/"
+                }
+            ],
+            "description": "Native PHP GIF Encoder/Decoder",
+            "homepage": "https://github.com/intervention/gif",
+            "keywords": [
+                "animation",
+                "gd",
+                "gif",
+                "image"
+            ],
+            "funding": [
+                {
+                    "url": "https://paypal.me/interventionio",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/Intervention",
+                    "type": "github"
+                },
+                {
+                    "url": "https://ko-fi.com/interventionphp",
+                    "type": "ko_fi"
+                }
+            ],
+            "time": "2025-01-05T10:52:39+00:00"
+        },
+        {
+            "name": "intervention/image",
+            "version": "3.11.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Intervention/image.git",
+                "reference": "0f87254688e480fbb521e2a1ac6c11c784ca41af"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Intervention/image/zipball/0f87254688e480fbb521e2a1ac6c11c784ca41af",
+                "reference": "0f87254688e480fbb521e2a1ac6c11c784ca41af",
+                "shasum": ""
+            },
+            "require": {
+                "ext-mbstring": "*",
+                "intervention/gif": "^4.2",
+                "php": "^8.1"
+            },
+            "require-dev": {
+                "mockery/mockery": "^1.6",
+                "phpstan/phpstan": "^2.1",
+                "phpunit/phpunit": "^10.0 || ^11.0",
+                "slevomat/coding-standard": "~8.0",
+                "squizlabs/php_codesniffer": "^3.8"
+            },
+            "suggest": {
+                "ext-exif": "Recommended to be able to read EXIF data properly."
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Intervention\\Image\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Oliver Vogel",
+                    "email": "oliver@intervention.io",
+                    "homepage": "https://intervention.io/"
+                }
+            ],
+            "description": "PHP image manipulation",
+            "homepage": "https://image.intervention.io/",
+            "keywords": [
+                "gd",
+                "image",
+                "imagick",
+                "resize",
+                "thumbnail",
+                "watermark"
+            ],
+            "funding": [
+                {
+                    "url": "https://paypal.me/interventionio",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/Intervention",
+                    "type": "github"
+                },
+                {
+                    "url": "https://ko-fi.com/interventionphp",
+                    "type": "ko_fi"
+                }
+            ],
+            "time": "2025-02-01T07:28:26+00:00"
+        },
         {
             "name": "laravel/framework",
             "version": "dev-master",
diff --git a/resources/views/admin/courses/index.blade.php b/resources/views/admin/courses/index.blade.php
index 6d342d9..6cd9ed8 100644
--- a/resources/views/admin/courses/index.blade.php
+++ b/resources/views/admin/courses/index.blade.php
@@ -43,7 +43,7 @@
                         <div class="col-md-4 mb-4">
                             <div class="card h-100 shadow-sm">
                                 @if($course->thumbnail)
-                                <img src="{{ asset('storage/' . $course->thumbnail) }}" class="card-img-top" alt="{{ $course->title }}" style="height:200px;object-fit:cover;">
+                                <img src="{{ asset('storage/' . str_replace('_thumb.', '.', $course->thumbnail)) }}" class="card-img-top" alt="{{ $course->title }}" style="height:200px;object-fit:cover;">
                                 @else
                                 <div class="card-img-top bg-secondary d-flex align-items-center justify-content-center" style="height:200px;"><i class="bi bi-book text-white" style="font-size:4rem;"></i></div>
                                 @endif
diff --git a/resources/views/admin/courses/show.blade.php b/resources/views/admin/courses/show.blade.php
index 3782971..4e3ae70 100644
--- a/resources/views/admin/courses/show.blade.php
+++ b/resources/views/admin/courses/show.blade.php
@@ -15,7 +15,7 @@
             <div class="row">
                 <div class="col-md-4 mb-4">
                     <div class="card shadow-sm">
-                        @if($course->thumbnail)<img src="{{ asset('storage/' . $course->thumbnail) }}" class="card-img-top" alt="{{ $course->title }}">
+                        @if($course->thumbnail)<img src="{{ asset('storage/' . str_replace('_thumb.', '.', $course->thumbnail)) }}" class="card-img-top" alt="{{ $course->title }}">
                         @else<div class="card-img-top bg-secondary d-flex align-items-center justify-content-center" style="height:200px;"><i class="bi bi-book text-white" style="font-size:4rem;"></i></div>@endif
                     </div>
                 </div>